Provenance plasticity of European beech leaf traits under differing environmental conditions at two Serbian common garden sites
2015
Аутори:
Stojnic, SrdanOrlovic, Sasa
Miljković, Danijela
Galic, Zoran
Kebert, Marko
von Wuehlisch, Georg
Тип документа:
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт:
Climate change will affect European beech (Fagus sylvatica L.)
ecosystems negatively due to well-known vulnerability of this species to
drought. Phenotypic plasticity has been recognized as the primary means
in rapid acclimation to adverse environmental conditions. Provenance
trials of forest tree species represent a valuable tool for assessing
provenance adaptive potential to changing environments. In the present
study, we examined the adaptive response capability (plasticity) of
certain leaf anatomical traits in different European beech provenances
to contrasting environmental conditions prevailing in two provenance
trials. While one location of the trials is an isolated, marginal site,
the other is a site within the original geographic range of beech
forests in Serbia. The study involved 12 provenances originating from
Austria, Bosnia and Herzegovina, Croatia, Germany, Hungary, Romania and
Serbia. The results of the study evidenced that genetic differences of
the provenances are mainly responsible for the differences in leaf
traits. Cluster analysis showed absence of association between
provenances from the same geographic regions (e.g., Germany and Balkan
Peninsula, respectively), revealing phenotypic heterogeneity between
them. Steep reaction norms, observed for anatomical traits studied,
indicate the possibility of plastic provenance response to changes in
environmental conditions. The highest values of plasticity index,
observed for stomatal density and thicknesses of palisade and spongy
parenchyma, seem to be the result of a regulative function of stomata
and mesophyll structure on physiological adaptation to the unfavorable
growth conditions at the marginal site. Such sclerophyllous leaf
structures, indicating drought resistance, were observed in certain
provenances from Central/Eastern Europe and mesic sites, indicating that
beech provenances from warmer sites in Southern Europe may not
necessarily be the only source of drought-resistant ecotypes.
Кључне речи:
European beech; Provenance trial; Leaf anatomical structure; Phenotypic plasticityИзвор:
European Journal of Forest Research, 2015, 134, 6, 1109-1125
DOI: 10.1007/s10342-015-0914-y
ISSN: 1612-4677